1fec754d4SMike Smith /*- 298aa9cd0SNate Lawson * Copyright (c) 2003-2005 Nate Lawson (SDG) 3fec754d4SMike Smith * Copyright (c) 2001 Michael Smith 4fec754d4SMike Smith * All rights reserved. 5fec754d4SMike Smith * 6fec754d4SMike Smith * Redistribution and use in source and binary forms, with or without 7fec754d4SMike Smith * modification, are permitted provided that the following conditions 8fec754d4SMike Smith * are met: 9fec754d4SMike Smith * 1. Redistributions of source code must retain the above copyright 10fec754d4SMike Smith * notice, this list of conditions and the following disclaimer. 11fec754d4SMike Smith * 2. Redistributions in binary form must reproduce the above copyright 12fec754d4SMike Smith * notice, this list of conditions and the following disclaimer in the 13fec754d4SMike Smith * documentation and/or other materials provided with the distribution. 14fec754d4SMike Smith * 15fec754d4SMike Smith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16fec754d4SMike Smith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17fec754d4SMike Smith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18fec754d4SMike Smith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19fec754d4SMike Smith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20fec754d4SMike Smith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21fec754d4SMike Smith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22fec754d4SMike Smith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23fec754d4SMike Smith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24fec754d4SMike Smith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25fec754d4SMike Smith * SUCH DAMAGE. 26fec754d4SMike Smith */ 27fec754d4SMike Smith 28aad970f1SDavid E. O'Brien #include <sys/cdefs.h> 29aad970f1SDavid E. O'Brien __FBSDID("$FreeBSD$"); 30aad970f1SDavid E. O'Brien 31fec754d4SMike Smith #include "opt_acpi.h" 32fec754d4SMike Smith #include <sys/param.h> 33fec754d4SMike Smith #include <sys/bus.h> 3498aa9cd0SNate Lawson #include <sys/cpu.h> 3556a70eadSNate Lawson #include <sys/kernel.h> 36447a5fa1SJohn Baldwin #include <sys/malloc.h> 37fe12f24bSPoul-Henning Kamp #include <sys/module.h> 386b74f9b7SNate Lawson #include <sys/pcpu.h> 3956a70eadSNate Lawson #include <sys/power.h> 4056a70eadSNate Lawson #include <sys/proc.h> 4156a70eadSNate Lawson #include <sys/sbuf.h> 426b74f9b7SNate Lawson #include <sys/smp.h> 43fec754d4SMike Smith 446b74f9b7SNate Lawson #include <dev/pci/pcivar.h> 4556a70eadSNate Lawson #include <machine/atomic.h> 46fec754d4SMike Smith #include <machine/bus.h> 4756a70eadSNate Lawson #include <sys/rman.h> 48fec754d4SMike Smith 49129d3046SJung-uk Kim #include <contrib/dev/acpica/include/acpi.h> 50129d3046SJung-uk Kim #include <contrib/dev/acpica/include/accommon.h> 51129d3046SJung-uk Kim 52fec754d4SMike Smith #include <dev/acpica/acpivar.h> 53fec754d4SMike Smith 54fec754d4SMike Smith /* 558c5468e3SNate Lawson * Support for ACPI Processor devices, including C[1-3] sleep states. 56fec754d4SMike Smith */ 57fec754d4SMike Smith 58be2b1797SNate Lawson /* Hooks for the ACPI CA debugging infrastructure */ 59fec754d4SMike Smith #define _COMPONENT ACPI_PROCESSOR 609127281cSMike Smith ACPI_MODULE_NAME("PROCESSOR") 61fec754d4SMike Smith 626b74f9b7SNate Lawson struct acpi_cx { 636b74f9b7SNate Lawson struct resource *p_lvlx; /* Register to read to enter state. */ 646b74f9b7SNate Lawson uint32_t type; /* C1-3 (C4 and up treated as C3). */ 656b74f9b7SNate Lawson uint32_t trans_lat; /* Transition latency (usec). */ 666b74f9b7SNate Lawson uint32_t power; /* Power consumed (mW). */ 67f4eb0418SNate Lawson int res_type; /* Resource type for p_lvlx. */ 686b74f9b7SNate Lawson }; 696b74f9b7SNate Lawson #define MAX_CX_STATES 8 706b74f9b7SNate Lawson 71fec754d4SMike Smith struct acpi_cpu_softc { 72fec754d4SMike Smith device_t cpu_dev; 73fec754d4SMike Smith ACPI_HANDLE cpu_handle; 7498aa9cd0SNate Lawson struct pcpu *cpu_pcpu; 7598aa9cd0SNate Lawson uint32_t cpu_acpi_id; /* ACPI processor id */ 7656a70eadSNate Lawson uint32_t cpu_p_blk; /* ACPI P_BLK location */ 7756a70eadSNate Lawson uint32_t cpu_p_blk_len; /* P_BLK length (must be 6). */ 786b74f9b7SNate Lawson struct acpi_cx cpu_cx_states[MAX_CX_STATES]; 7956a70eadSNate Lawson int cpu_cx_count; /* Number of valid Cx states. */ 80a2afe45aSNate Lawson int cpu_prev_sleep;/* Last idle sleep duration. */ 81b29224c2SNate Lawson int cpu_features; /* Child driver supported features. */ 82907b6777SNate Lawson /* Runtime state. */ 83907b6777SNate Lawson int cpu_non_c3; /* Index of lowest non-C3 state. */ 84907b6777SNate Lawson u_int cpu_cx_stats[MAX_CX_STATES];/* Cx usage history. */ 85907b6777SNate Lawson /* Values for sysctl. */ 86907b6777SNate Lawson struct sysctl_ctx_list cpu_sysctl_ctx; 87907b6777SNate Lawson struct sysctl_oid *cpu_sysctl_tree; 88907b6777SNate Lawson int cpu_cx_lowest; 89907b6777SNate Lawson char cpu_cx_supported[64]; 90907b6777SNate Lawson int cpu_rid; 91fec754d4SMike Smith }; 92fec754d4SMike Smith 9398aa9cd0SNate Lawson struct acpi_cpu_device { 9498aa9cd0SNate Lawson struct resource_list ad_rl; 9598aa9cd0SNate Lawson }; 9698aa9cd0SNate Lawson 976b74f9b7SNate Lawson #define CPU_GET_REG(reg, width) \ 986b74f9b7SNate Lawson (bus_space_read_ ## width(rman_get_bustag((reg)), \ 996b74f9b7SNate Lawson rman_get_bushandle((reg)), 0)) 1006b74f9b7SNate Lawson #define CPU_SET_REG(reg, width, val) \ 1016b74f9b7SNate Lawson (bus_space_write_ ## width(rman_get_bustag((reg)), \ 1026b74f9b7SNate Lawson rman_get_bushandle((reg)), 0, (val))) 103be2b1797SNate Lawson 1046b74f9b7SNate Lawson #define PM_USEC(x) ((x) >> 2) /* ~4 clocks per usec (3.57955 Mhz) */ 105fec754d4SMike Smith 1068b888c66SNate Lawson #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */ 107fec754d4SMike Smith 10818ececa0SNate Lawson #define CPU_QUIRK_NO_C3 (1<<0) /* C3-type states are not usable. */ 10918ececa0SNate Lawson #define CPU_QUIRK_NO_BM_CTRL (1<<2) /* No bus mastering control. */ 1106b74f9b7SNate Lawson 1116b74f9b7SNate Lawson #define PCI_VENDOR_INTEL 0x8086 1126b74f9b7SNate Lawson #define PCI_DEVICE_82371AB_3 0x7113 /* PIIX4 chipset for quirks. */ 1136b74f9b7SNate Lawson #define PCI_REVISION_A_STEP 0 1146b74f9b7SNate Lawson #define PCI_REVISION_B_STEP 1 1156b74f9b7SNate Lawson #define PCI_REVISION_4E 2 1166b74f9b7SNate Lawson #define PCI_REVISION_4M 3 1178a000acaSRui Paulo #define PIIX4_DEVACTB_REG 0x58 1188a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ0 (1<<0) 1198a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ (1<<1) 1208a000acaSRui Paulo #define PIIX4_BRLD_EN_IRQ8 (1<<5) 1218a000acaSRui Paulo #define PIIX4_STOP_BREAK_MASK (PIIX4_BRLD_EN_IRQ0 | PIIX4_BRLD_EN_IRQ | PIIX4_BRLD_EN_IRQ8) 1228a000acaSRui Paulo #define PIIX4_PCNTRL_BST_EN (1<<10) 1236b74f9b7SNate Lawson 1246b74f9b7SNate Lawson /* Platform hardware resource information. */ 1256b74f9b7SNate Lawson static uint32_t cpu_smi_cmd; /* Value to write to SMI_CMD. */ 12656a70eadSNate Lawson static uint8_t cpu_cst_cnt; /* Indicate we are _CST aware. */ 127a2afe45aSNate Lawson static int cpu_quirks; /* Indicate any hardware bugs. */ 1286b74f9b7SNate Lawson 1296b74f9b7SNate Lawson /* Runtime state. */ 130907b6777SNate Lawson static int cpu_disable_idle; /* Disable entry to idle function */ 131907b6777SNate Lawson static int cpu_cx_count; /* Number of valid Cx states */ 1326b74f9b7SNate Lawson 1336b74f9b7SNate Lawson /* Values for sysctl. */ 134907b6777SNate Lawson static struct sysctl_ctx_list cpu_sysctl_ctx; 135907b6777SNate Lawson static struct sysctl_oid *cpu_sysctl_tree; 136907b6777SNate Lawson static int cpu_cx_generic; 1376b74f9b7SNate Lawson static int cpu_cx_lowest; 138fec754d4SMike Smith 139fec754d4SMike Smith static device_t *cpu_devices; 140fec754d4SMike Smith static int cpu_ndevices; 141447a5fa1SJohn Baldwin static struct acpi_cpu_softc **cpu_softc; 142d92a2ebdSNate Lawson ACPI_SERIAL_DECL(cpu, "ACPI CPU"); 143fec754d4SMike Smith 144fec754d4SMike Smith static int acpi_cpu_probe(device_t dev); 145fec754d4SMike Smith static int acpi_cpu_attach(device_t dev); 1463331373cSNate Lawson static int acpi_cpu_suspend(device_t dev); 1473331373cSNate Lawson static int acpi_cpu_resume(device_t dev); 148b6426963SNate Lawson static int acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, 149b6426963SNate Lawson uint32_t *cpu_id); 15098aa9cd0SNate Lawson static struct resource_list *acpi_cpu_get_rlist(device_t dev, device_t child); 1513d844eddSAndriy Gapon static device_t acpi_cpu_add_child(device_t dev, u_int order, const char *name, 15298aa9cd0SNate Lawson int unit); 15398aa9cd0SNate Lawson static int acpi_cpu_read_ivar(device_t dev, device_t child, int index, 15498aa9cd0SNate Lawson uintptr_t *result); 15556a70eadSNate Lawson static int acpi_cpu_shutdown(device_t dev); 156907b6777SNate Lawson static void acpi_cpu_cx_probe(struct acpi_cpu_softc *sc); 157907b6777SNate Lawson static void acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc); 1586b74f9b7SNate Lawson static int acpi_cpu_cx_cst(struct acpi_cpu_softc *sc); 1596b74f9b7SNate Lawson static void acpi_cpu_startup(void *arg); 160907b6777SNate Lawson static void acpi_cpu_startup_cx(struct acpi_cpu_softc *sc); 16189ab2a7aSRui Paulo static void acpi_cpu_cx_list(struct acpi_cpu_softc *sc); 1626b74f9b7SNate Lawson static void acpi_cpu_idle(void); 1636b74f9b7SNate Lawson static void acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context); 164907b6777SNate Lawson static int acpi_cpu_quirks(void); 165a2afe45aSNate Lawson static int acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS); 1663331373cSNate Lawson static int acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc, int val); 1676b74f9b7SNate Lawson static int acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 168907b6777SNate Lawson static int acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS); 169fec754d4SMike Smith 170fec754d4SMike Smith static device_method_t acpi_cpu_methods[] = { 171fec754d4SMike Smith /* Device interface */ 172fec754d4SMike Smith DEVMETHOD(device_probe, acpi_cpu_probe), 173fec754d4SMike Smith DEVMETHOD(device_attach, acpi_cpu_attach), 17498aa9cd0SNate Lawson DEVMETHOD(device_detach, bus_generic_detach), 17556a70eadSNate Lawson DEVMETHOD(device_shutdown, acpi_cpu_shutdown), 1763331373cSNate Lawson DEVMETHOD(device_suspend, acpi_cpu_suspend), 1773331373cSNate Lawson DEVMETHOD(device_resume, acpi_cpu_resume), 17898aa9cd0SNate Lawson 17998aa9cd0SNate Lawson /* Bus interface */ 18098aa9cd0SNate Lawson DEVMETHOD(bus_add_child, acpi_cpu_add_child), 18198aa9cd0SNate Lawson DEVMETHOD(bus_read_ivar, acpi_cpu_read_ivar), 18298aa9cd0SNate Lawson DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist), 18398aa9cd0SNate Lawson DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 18498aa9cd0SNate Lawson DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 18598aa9cd0SNate Lawson DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 18698aa9cd0SNate Lawson DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 18798aa9cd0SNate Lawson DEVMETHOD(bus_driver_added, bus_generic_driver_added), 18898aa9cd0SNate Lawson DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 18998aa9cd0SNate Lawson DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 19098aa9cd0SNate Lawson DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 19198aa9cd0SNate Lawson DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 192fec754d4SMike Smith 193fec754d4SMike Smith {0, 0} 194fec754d4SMike Smith }; 195fec754d4SMike Smith 196fec754d4SMike Smith static driver_t acpi_cpu_driver = { 197b0e2b625SNate Lawson "cpu", 198fec754d4SMike Smith acpi_cpu_methods, 199fec754d4SMike Smith sizeof(struct acpi_cpu_softc), 200fec754d4SMike Smith }; 201fec754d4SMike Smith 2023045c8afSNate Lawson static devclass_t acpi_cpu_devclass; 2033045c8afSNate Lawson DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0); 204b0e2b625SNate Lawson MODULE_DEPEND(cpu, acpi, 1, 1, 1); 20556a70eadSNate Lawson 206fec754d4SMike Smith static int 207fec754d4SMike Smith acpi_cpu_probe(device_t dev) 208fec754d4SMike Smith { 209b29224c2SNate Lawson int acpi_id, cpu_id; 210b0e2b625SNate Lawson ACPI_BUFFER buf; 211b0e2b625SNate Lawson ACPI_HANDLE handle; 212b0e2b625SNate Lawson ACPI_OBJECT *obj; 213b0e2b625SNate Lawson ACPI_STATUS status; 214b0e2b625SNate Lawson 215b0e2b625SNate Lawson if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR) 216b0e2b625SNate Lawson return (ENXIO); 217b0e2b625SNate Lawson 218b0e2b625SNate Lawson handle = acpi_get_handle(dev); 219447a5fa1SJohn Baldwin if (cpu_softc == NULL) 220447a5fa1SJohn Baldwin cpu_softc = malloc(sizeof(struct acpi_cpu_softc *) * 221447a5fa1SJohn Baldwin (mp_maxid + 1), M_TEMP /* XXX */, M_WAITOK | M_ZERO); 222b0e2b625SNate Lawson 223b0e2b625SNate Lawson /* Get our Processor object. */ 224b0e2b625SNate Lawson buf.Pointer = NULL; 225b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 226b0e2b625SNate Lawson status = AcpiEvaluateObject(handle, NULL, NULL, &buf); 227b0e2b625SNate Lawson if (ACPI_FAILURE(status)) { 228b0e2b625SNate Lawson device_printf(dev, "probe failed to get Processor obj - %s\n", 229b0e2b625SNate Lawson AcpiFormatException(status)); 230b0e2b625SNate Lawson return (ENXIO); 231b0e2b625SNate Lawson } 232b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 233b0e2b625SNate Lawson if (obj->Type != ACPI_TYPE_PROCESSOR) { 234b0e2b625SNate Lawson device_printf(dev, "Processor object has bad type %d\n", obj->Type); 235b0e2b625SNate Lawson AcpiOsFree(obj); 236b0e2b625SNate Lawson return (ENXIO); 237fec754d4SMike Smith } 238be2b1797SNate Lawson 239b0e2b625SNate Lawson /* 240b0e2b625SNate Lawson * Find the processor associated with our unit. We could use the 241b0e2b625SNate Lawson * ProcId as a key, however, some boxes do not have the same values 242b0e2b625SNate Lawson * in their Processor object as the ProcId values in the MADT. 243b0e2b625SNate Lawson */ 244b0e2b625SNate Lawson acpi_id = obj->Processor.ProcId; 245b0e2b625SNate Lawson AcpiOsFree(obj); 246b0e2b625SNate Lawson if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0) 247fec754d4SMike Smith return (ENXIO); 248b0e2b625SNate Lawson 249b0e2b625SNate Lawson /* 250b0e2b625SNate Lawson * Check if we already probed this processor. We scan the bus twice 251b0e2b625SNate Lawson * so it's possible we've already seen this one. 252b0e2b625SNate Lawson */ 253b0e2b625SNate Lawson if (cpu_softc[cpu_id] != NULL) 254b0e2b625SNate Lawson return (ENXIO); 255b0e2b625SNate Lawson 256b0e2b625SNate Lawson /* Mark this processor as in-use and save our derived id for attach. */ 257b0e2b625SNate Lawson cpu_softc[cpu_id] = (void *)1; 258f6eb382cSAndriy Gapon acpi_set_private(dev, (void*)(intptr_t)cpu_id); 259b29224c2SNate Lawson device_set_desc(dev, "ACPI CPU"); 260b0e2b625SNate Lawson 261b0e2b625SNate Lawson return (0); 262fec754d4SMike Smith } 263fec754d4SMike Smith 264fec754d4SMike Smith static int 265fec754d4SMike Smith acpi_cpu_attach(device_t dev) 266fec754d4SMike Smith { 267b0e2b625SNate Lawson ACPI_BUFFER buf; 268c961facaSNate Lawson ACPI_OBJECT arg[4], *obj; 269bce92885SNate Lawson ACPI_OBJECT_LIST arglist; 27098aa9cd0SNate Lawson struct pcpu *pcpu_data; 271fec754d4SMike Smith struct acpi_cpu_softc *sc; 272fec754d4SMike Smith struct acpi_softc *acpi_sc; 273fec754d4SMike Smith ACPI_STATUS status; 274b29224c2SNate Lawson u_int features; 275b29224c2SNate Lawson int cpu_id, drv_count, i; 276b29224c2SNate Lawson driver_t **drivers; 277bce92885SNate Lawson uint32_t cap_set[3]; 278fec754d4SMike Smith 279c961facaSNate Lawson /* UUID needed by _OSC evaluation */ 280c961facaSNate Lawson static uint8_t cpu_oscuuid[16] = { 0x16, 0xA6, 0x77, 0x40, 0x0C, 0x29, 281c961facaSNate Lawson 0xBE, 0x47, 0x9E, 0xBD, 0xD8, 0x70, 282c961facaSNate Lawson 0x58, 0x71, 0x39, 0x53 }; 283c961facaSNate Lawson 284b4a05238SPeter Wemm ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 285fec754d4SMike Smith 286fec754d4SMike Smith sc = device_get_softc(dev); 287fec754d4SMike Smith sc->cpu_dev = dev; 288fec754d4SMike Smith sc->cpu_handle = acpi_get_handle(dev); 289f6eb382cSAndriy Gapon cpu_id = (int)(intptr_t)acpi_get_private(dev); 29098aa9cd0SNate Lawson cpu_softc[cpu_id] = sc; 29198aa9cd0SNate Lawson pcpu_data = pcpu_find(cpu_id); 29298aa9cd0SNate Lawson pcpu_data->pc_device = dev; 29398aa9cd0SNate Lawson sc->cpu_pcpu = pcpu_data; 2942be4e471SJung-uk Kim cpu_smi_cmd = AcpiGbl_FADT.SmiCommand; 2952be4e471SJung-uk Kim cpu_cst_cnt = AcpiGbl_FADT.CstControl; 296fec754d4SMike Smith 297b0e2b625SNate Lawson buf.Pointer = NULL; 298b0e2b625SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 2996b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf); 3006b74f9b7SNate Lawson if (ACPI_FAILURE(status)) { 301b0e2b625SNate Lawson device_printf(dev, "attach failed to get Processor obj - %s\n", 3026b74f9b7SNate Lawson AcpiFormatException(status)); 3036b74f9b7SNate Lawson return (ENXIO); 304b0e2b625SNate Lawson } 305b0e2b625SNate Lawson obj = (ACPI_OBJECT *)buf.Pointer; 306b0e2b625SNate Lawson sc->cpu_p_blk = obj->Processor.PblkAddress; 307b0e2b625SNate Lawson sc->cpu_p_blk_len = obj->Processor.PblkLength; 30898aa9cd0SNate Lawson sc->cpu_acpi_id = obj->Processor.ProcId; 309b0e2b625SNate Lawson AcpiOsFree(obj); 31056a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, "acpi_cpu%d: P_BLK at %#x/%d\n", 31156a70eadSNate Lawson device_get_unit(dev), sc->cpu_p_blk, sc->cpu_p_blk_len)); 3126b74f9b7SNate Lawson 313907b6777SNate Lawson /* 314907b6777SNate Lawson * If this is the first cpu we attach, create and initialize the generic 315907b6777SNate Lawson * resources that will be used by all acpi cpu devices. 316907b6777SNate Lawson */ 317907b6777SNate Lawson if (device_get_unit(dev) == 0) { 318907b6777SNate Lawson /* Assume we won't be using generic Cx mode by default */ 319907b6777SNate Lawson cpu_cx_generic = FALSE; 320907b6777SNate Lawson 321907b6777SNate Lawson /* Install hw.acpi.cpu sysctl tree */ 322fec754d4SMike Smith acpi_sc = acpi_device_get_parent_softc(dev); 323907b6777SNate Lawson sysctl_ctx_init(&cpu_sysctl_ctx); 324907b6777SNate Lawson cpu_sysctl_tree = SYSCTL_ADD_NODE(&cpu_sysctl_ctx, 32598aa9cd0SNate Lawson SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "cpu", 326907b6777SNate Lawson CTLFLAG_RD, 0, "node for CPU children"); 327907b6777SNate Lawson 328907b6777SNate Lawson /* Queue post cpu-probing task handler */ 3292be4e471SJung-uk Kim AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL); 330907b6777SNate Lawson } 331fec754d4SMike Smith 3326b74f9b7SNate Lawson /* 333b29224c2SNate Lawson * Before calling any CPU methods, collect child driver feature hints 334f2d94257SNate Lawson * and notify ACPI of them. We support unified SMP power control 335f2d94257SNate Lawson * so advertise this ourselves. Note this is not the same as independent 336f2d94257SNate Lawson * SMP control where each CPU can have different settings. 337b29224c2SNate Lawson */ 338f2d94257SNate Lawson sc->cpu_features = ACPI_CAP_SMP_SAME | ACPI_CAP_SMP_SAME_C3; 339b29224c2SNate Lawson if (devclass_get_drivers(acpi_cpu_devclass, &drivers, &drv_count) == 0) { 340b29224c2SNate Lawson for (i = 0; i < drv_count; i++) { 341b29224c2SNate Lawson if (ACPI_GET_FEATURES(drivers[i], &features) == 0) 342b29224c2SNate Lawson sc->cpu_features |= features; 343b29224c2SNate Lawson } 344b29224c2SNate Lawson free(drivers, M_TEMP); 345b29224c2SNate Lawson } 346bce92885SNate Lawson 347bce92885SNate Lawson /* 348f4ab0cccSAndriy Gapon * CPU capabilities are specified in 349f4ab0cccSAndriy Gapon * Intel Processor Vendor-Specific ACPI Interface Specification. 350bce92885SNate Lawson */ 351bce92885SNate Lawson if (sc->cpu_features) { 352c961facaSNate Lawson arglist.Pointer = arg; 353c961facaSNate Lawson arglist.Count = 4; 354c961facaSNate Lawson arg[0].Type = ACPI_TYPE_BUFFER; 355c961facaSNate Lawson arg[0].Buffer.Length = sizeof(cpu_oscuuid); 356c961facaSNate Lawson arg[0].Buffer.Pointer = cpu_oscuuid; /* UUID */ 357c961facaSNate Lawson arg[1].Type = ACPI_TYPE_INTEGER; 358c961facaSNate Lawson arg[1].Integer.Value = 1; /* revision */ 359c961facaSNate Lawson arg[2].Type = ACPI_TYPE_INTEGER; 360c961facaSNate Lawson arg[2].Integer.Value = 1; /* count */ 361c961facaSNate Lawson arg[3].Type = ACPI_TYPE_BUFFER; 362c961facaSNate Lawson arg[3].Buffer.Length = sizeof(cap_set); /* Capabilities buffer */ 363c961facaSNate Lawson arg[3].Buffer.Pointer = (uint8_t *)cap_set; 364877a6d99SAndriy Gapon cap_set[0] = 0; /* status */ 365877a6d99SAndriy Gapon cap_set[1] = sc->cpu_features; 366f4ab0cccSAndriy Gapon status = AcpiEvaluateObject(sc->cpu_handle, "_OSC", &arglist, NULL); 367f4ab0cccSAndriy Gapon if (ACPI_SUCCESS(status)) { 368f4ab0cccSAndriy Gapon if (cap_set[0] != 0) 369f4ab0cccSAndriy Gapon device_printf(dev, "_OSC returned status %#x\n", cap_set[0]); 370f4ab0cccSAndriy Gapon } 371f4ab0cccSAndriy Gapon else { 372f4ab0cccSAndriy Gapon arglist.Pointer = arg; 373f4ab0cccSAndriy Gapon arglist.Count = 1; 374f4ab0cccSAndriy Gapon arg[0].Type = ACPI_TYPE_BUFFER; 375f4ab0cccSAndriy Gapon arg[0].Buffer.Length = sizeof(cap_set); 376f4ab0cccSAndriy Gapon arg[0].Buffer.Pointer = (uint8_t *)cap_set; 377f4ab0cccSAndriy Gapon cap_set[0] = 1; /* revision */ 378f4ab0cccSAndriy Gapon cap_set[1] = 1; /* number of capabilities integers */ 379f4ab0cccSAndriy Gapon cap_set[2] = sc->cpu_features; 380f4ab0cccSAndriy Gapon AcpiEvaluateObject(sc->cpu_handle, "_PDC", &arglist, NULL); 381f4ab0cccSAndriy Gapon } 382bce92885SNate Lawson } 383b29224c2SNate Lawson 384907b6777SNate Lawson /* Probe for Cx state support. */ 385907b6777SNate Lawson acpi_cpu_cx_probe(sc); 3866b74f9b7SNate Lawson 38798aa9cd0SNate Lawson return (0); 3886b74f9b7SNate Lawson } 3896b74f9b7SNate Lawson 390aa835160SAndriy Gapon static void 391aa835160SAndriy Gapon acpi_cpu_postattach(void *unused __unused) 392aa835160SAndriy Gapon { 393aa835160SAndriy Gapon device_t *devices; 394aa835160SAndriy Gapon int err; 395aa835160SAndriy Gapon int i, n; 396aa835160SAndriy Gapon 397aa835160SAndriy Gapon err = devclass_get_devices(acpi_cpu_devclass, &devices, &n); 398aa835160SAndriy Gapon if (err != 0) { 399aa835160SAndriy Gapon printf("devclass_get_devices(acpi_cpu_devclass) failed\n"); 400aa835160SAndriy Gapon return; 401aa835160SAndriy Gapon } 402aa835160SAndriy Gapon for (i = 0; i < n; i++) 403aa835160SAndriy Gapon bus_generic_probe(devices[i]); 404aa835160SAndriy Gapon for (i = 0; i < n; i++) 405aa835160SAndriy Gapon bus_generic_attach(devices[i]); 406aa835160SAndriy Gapon free(devices, M_TEMP); 407aa835160SAndriy Gapon } 408aa835160SAndriy Gapon 409aa835160SAndriy Gapon SYSINIT(acpi_cpu, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, 410aa835160SAndriy Gapon acpi_cpu_postattach, NULL); 411aa835160SAndriy Gapon 412b6426963SNate Lawson /* 4133331373cSNate Lawson * Disable any entry to the idle function during suspend and re-enable it 4143331373cSNate Lawson * during resume. 4153331373cSNate Lawson */ 4163331373cSNate Lawson static int 4173331373cSNate Lawson acpi_cpu_suspend(device_t dev) 4183331373cSNate Lawson { 4193331373cSNate Lawson int error; 4203331373cSNate Lawson 4213331373cSNate Lawson error = bus_generic_suspend(dev); 4223331373cSNate Lawson if (error) 4233331373cSNate Lawson return (error); 4243331373cSNate Lawson cpu_disable_idle = TRUE; 4253331373cSNate Lawson return (0); 4263331373cSNate Lawson } 4273331373cSNate Lawson 4283331373cSNate Lawson static int 4293331373cSNate Lawson acpi_cpu_resume(device_t dev) 4303331373cSNate Lawson { 4313331373cSNate Lawson 4323331373cSNate Lawson cpu_disable_idle = FALSE; 4333331373cSNate Lawson return (bus_generic_resume(dev)); 4343331373cSNate Lawson } 4353331373cSNate Lawson 4363331373cSNate Lawson /* 437b6426963SNate Lawson * Find the nth present CPU and return its pc_cpuid as well as set the 438b6426963SNate Lawson * pc_acpi_id from the most reliable source. 439b6426963SNate Lawson */ 440b6426963SNate Lawson static int 441b6426963SNate Lawson acpi_pcpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id) 442b6426963SNate Lawson { 443b6426963SNate Lawson struct pcpu *pcpu_data; 444b6426963SNate Lawson uint32_t i; 445b6426963SNate Lawson 446b6426963SNate Lawson KASSERT(acpi_id != NULL, ("Null acpi_id")); 447b6426963SNate Lawson KASSERT(cpu_id != NULL, ("Null cpu_id")); 4483aa6d94eSJohn Baldwin CPU_FOREACH(i) { 449b6426963SNate Lawson pcpu_data = pcpu_find(i); 450b6426963SNate Lawson KASSERT(pcpu_data != NULL, ("no pcpu data for %d", i)); 451b6426963SNate Lawson if (idx-- == 0) { 452b6426963SNate Lawson /* 453b6426963SNate Lawson * If pc_acpi_id was not initialized (e.g., a non-APIC UP box) 454b6426963SNate Lawson * override it with the value from the ASL. Otherwise, if the 455b6426963SNate Lawson * two don't match, prefer the MADT-derived value. Finally, 456b6426963SNate Lawson * return the pc_cpuid to reference this processor. 457b6426963SNate Lawson */ 458b6426963SNate Lawson if (pcpu_data->pc_acpi_id == 0xffffffff) 459b6426963SNate Lawson pcpu_data->pc_acpi_id = *acpi_id; 460b6426963SNate Lawson else if (pcpu_data->pc_acpi_id != *acpi_id) 461b6426963SNate Lawson *acpi_id = pcpu_data->pc_acpi_id; 462b6426963SNate Lawson *cpu_id = pcpu_data->pc_cpuid; 463b6426963SNate Lawson return (0); 464b6426963SNate Lawson } 465b6426963SNate Lawson } 466b6426963SNate Lawson 467b6426963SNate Lawson return (ESRCH); 468b6426963SNate Lawson } 469b6426963SNate Lawson 47098aa9cd0SNate Lawson static struct resource_list * 47198aa9cd0SNate Lawson acpi_cpu_get_rlist(device_t dev, device_t child) 47298aa9cd0SNate Lawson { 47398aa9cd0SNate Lawson struct acpi_cpu_device *ad; 47498aa9cd0SNate Lawson 47598aa9cd0SNate Lawson ad = device_get_ivars(child); 47698aa9cd0SNate Lawson if (ad == NULL) 47798aa9cd0SNate Lawson return (NULL); 47898aa9cd0SNate Lawson return (&ad->ad_rl); 47998aa9cd0SNate Lawson } 48098aa9cd0SNate Lawson 48198aa9cd0SNate Lawson static device_t 4823d844eddSAndriy Gapon acpi_cpu_add_child(device_t dev, u_int order, const char *name, int unit) 48398aa9cd0SNate Lawson { 48498aa9cd0SNate Lawson struct acpi_cpu_device *ad; 48598aa9cd0SNate Lawson device_t child; 48698aa9cd0SNate Lawson 48798aa9cd0SNate Lawson if ((ad = malloc(sizeof(*ad), M_TEMP, M_NOWAIT | M_ZERO)) == NULL) 48898aa9cd0SNate Lawson return (NULL); 48998aa9cd0SNate Lawson 49098aa9cd0SNate Lawson resource_list_init(&ad->ad_rl); 49198aa9cd0SNate Lawson 49298aa9cd0SNate Lawson child = device_add_child_ordered(dev, order, name, unit); 49398aa9cd0SNate Lawson if (child != NULL) 49498aa9cd0SNate Lawson device_set_ivars(child, ad); 49543ce1c77SNate Lawson else 49643ce1c77SNate Lawson free(ad, M_TEMP); 49798aa9cd0SNate Lawson return (child); 49898aa9cd0SNate Lawson } 49998aa9cd0SNate Lawson 50098aa9cd0SNate Lawson static int 50198aa9cd0SNate Lawson acpi_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 50298aa9cd0SNate Lawson { 50398aa9cd0SNate Lawson struct acpi_cpu_softc *sc; 50498aa9cd0SNate Lawson 50598aa9cd0SNate Lawson sc = device_get_softc(dev); 50698aa9cd0SNate Lawson switch (index) { 50798aa9cd0SNate Lawson case ACPI_IVAR_HANDLE: 50898aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_handle; 50998aa9cd0SNate Lawson break; 51098aa9cd0SNate Lawson case CPU_IVAR_PCPU: 51198aa9cd0SNate Lawson *result = (uintptr_t)sc->cpu_pcpu; 51298aa9cd0SNate Lawson break; 51398aa9cd0SNate Lawson default: 51498aa9cd0SNate Lawson return (ENOENT); 51598aa9cd0SNate Lawson } 51698aa9cd0SNate Lawson return (0); 51798aa9cd0SNate Lawson } 51898aa9cd0SNate Lawson 5196b74f9b7SNate Lawson static int 52056a70eadSNate Lawson acpi_cpu_shutdown(device_t dev) 52156a70eadSNate Lawson { 52256a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 52356a70eadSNate Lawson 52498aa9cd0SNate Lawson /* Allow children to shutdown first. */ 52598aa9cd0SNate Lawson bus_generic_shutdown(dev); 52698aa9cd0SNate Lawson 527cc3c11f9SNate Lawson /* 528cc3c11f9SNate Lawson * Disable any entry to the idle function. There is a small race where 529cc3c11f9SNate Lawson * an idle thread have passed this check but not gone to sleep. This 530cc3c11f9SNate Lawson * is ok since device_shutdown() does not free the softc, otherwise 531cc3c11f9SNate Lawson * we'd have to be sure all threads were evicted before returning. 532cc3c11f9SNate Lawson */ 533907b6777SNate Lawson cpu_disable_idle = TRUE; 53456a70eadSNate Lawson 53556a70eadSNate Lawson return_VALUE (0); 53656a70eadSNate Lawson } 53756a70eadSNate Lawson 538907b6777SNate Lawson static void 5396b74f9b7SNate Lawson acpi_cpu_cx_probe(struct acpi_cpu_softc *sc) 5406b74f9b7SNate Lawson { 541907b6777SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 542907b6777SNate Lawson 543907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 544907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 545907b6777SNate Lawson sc->cpu_cx_lowest = 0; 546907b6777SNate Lawson 547907b6777SNate Lawson /* 548907b6777SNate Lawson * Check for the ACPI 2.0 _CST sleep states object. If we can't find 549907b6777SNate Lawson * any, we'll revert to generic FADT/P_BLK Cx control method which will 550907b6777SNate Lawson * be handled by acpi_cpu_startup. We need to defer to after having 551907b6777SNate Lawson * probed all the cpus in the system before probing for generic Cx 552907b6777SNate Lawson * states as we may already have found cpus with valid _CST packages 553907b6777SNate Lawson */ 554907b6777SNate Lawson if (!cpu_cx_generic && acpi_cpu_cx_cst(sc) != 0) { 555907b6777SNate Lawson /* 556907b6777SNate Lawson * We were unable to find a _CST package for this cpu or there 557907b6777SNate Lawson * was an error parsing it. Switch back to generic mode. 558907b6777SNate Lawson */ 559907b6777SNate Lawson cpu_cx_generic = TRUE; 560bd826803SNate Lawson if (bootverbose) 561bd826803SNate Lawson device_printf(sc->cpu_dev, "switching to generic Cx mode\n"); 562907b6777SNate Lawson } 563907b6777SNate Lawson 564907b6777SNate Lawson /* 565907b6777SNate Lawson * TODO: _CSD Package should be checked here. 566907b6777SNate Lawson */ 567907b6777SNate Lawson } 568907b6777SNate Lawson 569907b6777SNate Lawson static void 570907b6777SNate Lawson acpi_cpu_generic_cx_probe(struct acpi_cpu_softc *sc) 571907b6777SNate Lawson { 5726b74f9b7SNate Lawson ACPI_GENERIC_ADDRESS gas; 5736b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 57456a70eadSNate Lawson 57556a70eadSNate Lawson sc->cpu_cx_count = 0; 5766b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 577fec754d4SMike Smith 578907b6777SNate Lawson /* Use initial sleep value of 1 sec. to start with lowest idle state. */ 579907b6777SNate Lawson sc->cpu_prev_sleep = 1000000; 580907b6777SNate Lawson 5816b74f9b7SNate Lawson /* C1 has been required since just after ACPI 1.0 */ 5826b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C1; 5836b74f9b7SNate Lawson cx_ptr->trans_lat = 0; 5846b74f9b7SNate Lawson cx_ptr++; 58556a70eadSNate Lawson sc->cpu_cx_count++; 58656a70eadSNate Lawson 587c181b89bSNate Lawson /* 588c181b89bSNate Lawson * The spec says P_BLK must be 6 bytes long. However, some systems 589c181b89bSNate Lawson * use it to indicate a fractional set of features present so we 590c181b89bSNate Lawson * take 5 as C2. Some may also have a value of 7 to indicate 591c181b89bSNate Lawson * another C3 but most use _CST for this (as required) and having 592c181b89bSNate Lawson * "only" C1-C3 is not a hardship. 593c181b89bSNate Lawson */ 594c181b89bSNate Lawson if (sc->cpu_p_blk_len < 5) 595907b6777SNate Lawson return; 596fec754d4SMike Smith 5976b74f9b7SNate Lawson /* Validate and allocate resources for C2 (P_LVL2). */ 5982be4e471SJung-uk Kim gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO; 5992be4e471SJung-uk Kim gas.BitWidth = 8; 6002be4e471SJung-uk Kim if (AcpiGbl_FADT.C2Latency <= 100) { 60156a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 4; 602907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, 603907b6777SNate Lawson &gas, &cx_ptr->p_lvlx, RF_SHAREABLE); 6046b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 605907b6777SNate Lawson sc->cpu_rid++; 6066b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C2; 6072be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C2Latency; 6086b74f9b7SNate Lawson cx_ptr++; 60956a70eadSNate Lawson sc->cpu_cx_count++; 610fec754d4SMike Smith } 611fec754d4SMike Smith } 612c181b89bSNate Lawson if (sc->cpu_p_blk_len < 6) 613907b6777SNate Lawson return; 614be2b1797SNate Lawson 6156b74f9b7SNate Lawson /* Validate and allocate resources for C3 (P_LVL3). */ 6166e1de64dSRui Paulo if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) { 61756a70eadSNate Lawson gas.Address = sc->cpu_p_blk + 5; 618907b6777SNate Lawson acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &sc->cpu_rid, &gas, 619907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 6206b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 621907b6777SNate Lawson sc->cpu_rid++; 6226b74f9b7SNate Lawson cx_ptr->type = ACPI_STATE_C3; 6232be4e471SJung-uk Kim cx_ptr->trans_lat = AcpiGbl_FADT.C3Latency; 6246b74f9b7SNate Lawson cx_ptr++; 62556a70eadSNate Lawson sc->cpu_cx_count++; 6266b74f9b7SNate Lawson } 6276b74f9b7SNate Lawson } 6286b74f9b7SNate Lawson } 6296b74f9b7SNate Lawson 6306b74f9b7SNate Lawson /* 6316b74f9b7SNate Lawson * Parse a _CST package and set up its Cx states. Since the _CST object 6326b74f9b7SNate Lawson * can change dynamically, our notify handler may call this function 6336b74f9b7SNate Lawson * to clean up and probe the new _CST package. 6346b74f9b7SNate Lawson */ 6356b74f9b7SNate Lawson static int 6366b74f9b7SNate Lawson acpi_cpu_cx_cst(struct acpi_cpu_softc *sc) 6376b74f9b7SNate Lawson { 6386b74f9b7SNate Lawson struct acpi_cx *cx_ptr; 6396b74f9b7SNate Lawson ACPI_STATUS status; 6406b74f9b7SNate Lawson ACPI_BUFFER buf; 6416b74f9b7SNate Lawson ACPI_OBJECT *top; 6426b74f9b7SNate Lawson ACPI_OBJECT *pkg; 6436b74f9b7SNate Lawson uint32_t count; 6446b74f9b7SNate Lawson int i; 6456b74f9b7SNate Lawson 64656a70eadSNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 64756a70eadSNate Lawson 6486b74f9b7SNate Lawson buf.Pointer = NULL; 6496b74f9b7SNate Lawson buf.Length = ACPI_ALLOCATE_BUFFER; 6506b74f9b7SNate Lawson status = AcpiEvaluateObject(sc->cpu_handle, "_CST", NULL, &buf); 651bd826803SNate Lawson if (ACPI_FAILURE(status)) 6526b74f9b7SNate Lawson return (ENXIO); 6536b74f9b7SNate Lawson 6546b74f9b7SNate Lawson /* _CST is a package with a count and at least one Cx package. */ 6556b74f9b7SNate Lawson top = (ACPI_OBJECT *)buf.Pointer; 65621cea91fSNate Lawson if (!ACPI_PKG_VALID(top, 2) || acpi_PkgInt32(top, 0, &count) != 0) { 657bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST package\n"); 6586b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 6596b74f9b7SNate Lawson return (ENXIO); 6606b74f9b7SNate Lawson } 6616b74f9b7SNate Lawson if (count != top->Package.Count - 1) { 662bd826803SNate Lawson device_printf(sc->cpu_dev, "invalid _CST state count (%d != %d)\n", 6636b74f9b7SNate Lawson count, top->Package.Count - 1); 6646b74f9b7SNate Lawson count = top->Package.Count - 1; 6656b74f9b7SNate Lawson } 6666b74f9b7SNate Lawson if (count > MAX_CX_STATES) { 66756a70eadSNate Lawson device_printf(sc->cpu_dev, "_CST has too many states (%d)\n", count); 6686b74f9b7SNate Lawson count = MAX_CX_STATES; 6696b74f9b7SNate Lawson } 6706b74f9b7SNate Lawson 6716b74f9b7SNate Lawson /* Set up all valid states. */ 67256a70eadSNate Lawson sc->cpu_cx_count = 0; 6736b74f9b7SNate Lawson cx_ptr = sc->cpu_cx_states; 6746b74f9b7SNate Lawson for (i = 0; i < count; i++) { 6756b74f9b7SNate Lawson pkg = &top->Package.Elements[i + 1]; 67621cea91fSNate Lawson if (!ACPI_PKG_VALID(pkg, 4) || 67721cea91fSNate Lawson acpi_PkgInt32(pkg, 1, &cx_ptr->type) != 0 || 67821cea91fSNate Lawson acpi_PkgInt32(pkg, 2, &cx_ptr->trans_lat) != 0 || 67921cea91fSNate Lawson acpi_PkgInt32(pkg, 3, &cx_ptr->power) != 0) { 68021cea91fSNate Lawson 68180f006a1SNate Lawson device_printf(sc->cpu_dev, "skipping invalid Cx state package\n"); 6826b74f9b7SNate Lawson continue; 6836b74f9b7SNate Lawson } 6846b74f9b7SNate Lawson 6856b74f9b7SNate Lawson /* Validate the state to see if we should use it. */ 6866b74f9b7SNate Lawson switch (cx_ptr->type) { 6876b74f9b7SNate Lawson case ACPI_STATE_C1: 688907b6777SNate Lawson sc->cpu_non_c3 = i; 6896b74f9b7SNate Lawson cx_ptr++; 69056a70eadSNate Lawson sc->cpu_cx_count++; 6916b74f9b7SNate Lawson continue; 6926b74f9b7SNate Lawson case ACPI_STATE_C2: 693907b6777SNate Lawson sc->cpu_non_c3 = i; 6946b74f9b7SNate Lawson break; 6956b74f9b7SNate Lawson case ACPI_STATE_C3: 6966b74f9b7SNate Lawson default: 69709c22c66SAndriy Gapon if ((cpu_quirks & CPU_QUIRK_NO_C3) != 0) { 69856a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 69956a70eadSNate Lawson "acpi_cpu%d: C3[%d] not available.\n", 70056a70eadSNate Lawson device_get_unit(sc->cpu_dev), i)); 7016b74f9b7SNate Lawson continue; 7026b74f9b7SNate Lawson } 7036b74f9b7SNate Lawson break; 7046b74f9b7SNate Lawson } 7056b74f9b7SNate Lawson 7066b74f9b7SNate Lawson #ifdef notyet 7076b74f9b7SNate Lawson /* Free up any previous register. */ 7086b74f9b7SNate Lawson if (cx_ptr->p_lvlx != NULL) { 7096b74f9b7SNate Lawson bus_release_resource(sc->cpu_dev, 0, 0, cx_ptr->p_lvlx); 7106b74f9b7SNate Lawson cx_ptr->p_lvlx = NULL; 7116b74f9b7SNate Lawson } 7126b74f9b7SNate Lawson #endif 7136b74f9b7SNate Lawson 7146b74f9b7SNate Lawson /* Allocate the control register for C2 or C3. */ 715907b6777SNate Lawson acpi_PkgGas(sc->cpu_dev, pkg, 0, &cx_ptr->res_type, &sc->cpu_rid, 716907b6777SNate Lawson &cx_ptr->p_lvlx, RF_SHAREABLE); 717f4eb0418SNate Lawson if (cx_ptr->p_lvlx) { 718907b6777SNate Lawson sc->cpu_rid++; 71956a70eadSNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 72056a70eadSNate Lawson "acpi_cpu%d: Got C%d - %d latency\n", 72156a70eadSNate Lawson device_get_unit(sc->cpu_dev), cx_ptr->type, 72256a70eadSNate Lawson cx_ptr->trans_lat)); 7236b74f9b7SNate Lawson cx_ptr++; 72456a70eadSNate Lawson sc->cpu_cx_count++; 7256b74f9b7SNate Lawson } 7266b74f9b7SNate Lawson } 7276b74f9b7SNate Lawson AcpiOsFree(buf.Pointer); 7286b74f9b7SNate Lawson 7296b74f9b7SNate Lawson return (0); 730fec754d4SMike Smith } 731fec754d4SMike Smith 732fec754d4SMike Smith /* 733fec754d4SMike Smith * Call this *after* all CPUs have been attached. 734fec754d4SMike Smith */ 735fec754d4SMike Smith static void 7366b74f9b7SNate Lawson acpi_cpu_startup(void *arg) 737fec754d4SMike Smith { 73856a70eadSNate Lawson struct acpi_cpu_softc *sc; 739907b6777SNate Lawson int i; 740fec754d4SMike Smith 741be2b1797SNate Lawson /* Get set of CPU devices */ 7423045c8afSNate Lawson devclass_get_devices(acpi_cpu_devclass, &cpu_devices, &cpu_ndevices); 743fec754d4SMike Smith 74456a70eadSNate Lawson /* 745907b6777SNate Lawson * Setup any quirks that might necessary now that we have probed 746907b6777SNate Lawson * all the CPUs 74756a70eadSNate Lawson */ 748907b6777SNate Lawson acpi_cpu_quirks(); 749907b6777SNate Lawson 750907b6777SNate Lawson cpu_cx_count = 0; 751907b6777SNate Lawson if (cpu_cx_generic) { 752907b6777SNate Lawson /* 753907b6777SNate Lawson * We are using generic Cx mode, probe for available Cx states 754907b6777SNate Lawson * for all processors. 755907b6777SNate Lawson */ 75656a70eadSNate Lawson for (i = 0; i < cpu_ndevices; i++) { 75756a70eadSNate Lawson sc = device_get_softc(cpu_devices[i]); 758907b6777SNate Lawson acpi_cpu_generic_cx_probe(sc); 759ea667177SJohn Baldwin if (sc->cpu_cx_count > cpu_cx_count) 760ea667177SJohn Baldwin cpu_cx_count = sc->cpu_cx_count; 76156a70eadSNate Lawson } 762907b6777SNate Lawson 763907b6777SNate Lawson /* 764907b6777SNate Lawson * Find the highest Cx state common to all CPUs 765907b6777SNate Lawson * in the system, taking quirks into account. 766907b6777SNate Lawson */ 767907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 768907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 769907b6777SNate Lawson if (sc->cpu_cx_count < cpu_cx_count) 770907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 771907b6777SNate Lawson } 772907b6777SNate Lawson } else { 773907b6777SNate Lawson /* 774907b6777SNate Lawson * We are using _CST mode, remove C3 state if necessary. 775907b6777SNate Lawson * Update the largest Cx state supported in the global cpu_cx_count. 776907b6777SNate Lawson * It will be used in the global Cx sysctl handler. 777907b6777SNate Lawson * As we now know for sure that we will be using _CST mode 778907b6777SNate Lawson * install our notify handler. 779907b6777SNate Lawson */ 780907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 781907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 7827a310721SJohn Baldwin if (cpu_quirks & CPU_QUIRK_NO_C3) { 783907b6777SNate Lawson sc->cpu_cx_count = sc->cpu_non_c3 + 1; 784907b6777SNate Lawson } 785907b6777SNate Lawson if (sc->cpu_cx_count > cpu_cx_count) 786907b6777SNate Lawson cpu_cx_count = sc->cpu_cx_count; 787907b6777SNate Lawson AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY, 788907b6777SNate Lawson acpi_cpu_notify, sc); 789907b6777SNate Lawson } 790907b6777SNate Lawson } 79156a70eadSNate Lawson 7928c5468e3SNate Lawson /* Perform Cx final initialization. */ 793907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 794907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 795907b6777SNate Lawson acpi_cpu_startup_cx(sc); 796907b6777SNate Lawson } 797907b6777SNate Lawson 798907b6777SNate Lawson /* Add a sysctl handler to handle global Cx lowest setting */ 799907b6777SNate Lawson SYSCTL_ADD_PROC(&cpu_sysctl_ctx, SYSCTL_CHILDREN(cpu_sysctl_tree), 800907b6777SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 801907b6777SNate Lawson NULL, 0, acpi_cpu_global_cx_lowest_sysctl, "A", 802907b6777SNate Lawson "Global lowest Cx sleep state to use"); 803907b6777SNate Lawson 804907b6777SNate Lawson /* Take over idling from cpu_idle_default(). */ 805907b6777SNate Lawson cpu_cx_lowest = 0; 806907b6777SNate Lawson cpu_disable_idle = FALSE; 807907b6777SNate Lawson cpu_idle_hook = acpi_cpu_idle; 8086b74f9b7SNate Lawson } 8096b74f9b7SNate Lawson 81056a70eadSNate Lawson static void 81189ab2a7aSRui Paulo acpi_cpu_cx_list(struct acpi_cpu_softc *sc) 81256a70eadSNate Lawson { 81356a70eadSNate Lawson struct sbuf sb; 81456a70eadSNate Lawson int i; 81556a70eadSNate Lawson 816ae56b59fSNate Lawson /* 817907b6777SNate Lawson * Set up the list of Cx states 818ae56b59fSNate Lawson */ 819907b6777SNate Lawson sc->cpu_non_c3 = 0; 820907b6777SNate Lawson sbuf_new(&sb, sc->cpu_cx_supported, sizeof(sc->cpu_cx_supported), 821907b6777SNate Lawson SBUF_FIXEDLEN); 822907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 823ccc09458SNate Lawson sbuf_printf(&sb, "C%d/%d ", i + 1, sc->cpu_cx_states[i].trans_lat); 824907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) 825907b6777SNate Lawson sc->cpu_non_c3 = i; 826ae56b59fSNate Lawson } 82756a70eadSNate Lawson sbuf_trim(&sb); 82856a70eadSNate Lawson sbuf_finish(&sb); 82989ab2a7aSRui Paulo } 83089ab2a7aSRui Paulo 83189ab2a7aSRui Paulo static void 83289ab2a7aSRui Paulo acpi_cpu_startup_cx(struct acpi_cpu_softc *sc) 83389ab2a7aSRui Paulo { 83489ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 835907b6777SNate Lawson 836907b6777SNate Lawson SYSCTL_ADD_STRING(&sc->cpu_sysctl_ctx, 837907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 838907b6777SNate Lawson OID_AUTO, "cx_supported", CTLFLAG_RD, 839907b6777SNate Lawson sc->cpu_cx_supported, 0, 840907b6777SNate Lawson "Cx/microsecond values for supported Cx states"); 841907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 842907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 843ccc09458SNate Lawson OID_AUTO, "cx_lowest", CTLTYPE_STRING | CTLFLAG_RW, 844907b6777SNate Lawson (void *)sc, 0, acpi_cpu_cx_lowest_sysctl, "A", 84556a70eadSNate Lawson "lowest Cx sleep state to use"); 846907b6777SNate Lawson SYSCTL_ADD_PROC(&sc->cpu_sysctl_ctx, 847907b6777SNate Lawson SYSCTL_CHILDREN(device_get_sysctl_tree(sc->cpu_dev)), 848a2afe45aSNate Lawson OID_AUTO, "cx_usage", CTLTYPE_STRING | CTLFLAG_RD, 849907b6777SNate Lawson (void *)sc, 0, acpi_cpu_usage_sysctl, "A", 850a2afe45aSNate Lawson "percent usage for each Cx state"); 85156a70eadSNate Lawson 85256a70eadSNate Lawson #ifdef notyet 85356a70eadSNate Lawson /* Signal platform that we can handle _CST notification. */ 854907b6777SNate Lawson if (!cpu_cx_generic && cpu_cst_cnt != 0) { 855d92a2ebdSNate Lawson ACPI_LOCK(acpi); 85656a70eadSNate Lawson AcpiOsWritePort(cpu_smi_cmd, cpu_cst_cnt, 8); 857d92a2ebdSNate Lawson ACPI_UNLOCK(acpi); 85856a70eadSNate Lawson } 85956a70eadSNate Lawson #endif 86056a70eadSNate Lawson } 86156a70eadSNate Lawson 862fec754d4SMike Smith /* 863a2afe45aSNate Lawson * Idle the CPU in the lowest state possible. This function is called with 864a2afe45aSNate Lawson * interrupts disabled. Note that once it re-enables interrupts, a task 865a2afe45aSNate Lawson * switch can occur so do not access shared data (i.e. the softc) after 866a2afe45aSNate Lawson * interrupts are re-enabled. 8676b74f9b7SNate Lawson */ 8686b74f9b7SNate Lawson static void 8696b74f9b7SNate Lawson acpi_cpu_idle() 8706b74f9b7SNate Lawson { 8716b74f9b7SNate Lawson struct acpi_cpu_softc *sc; 87256a70eadSNate Lawson struct acpi_cx *cx_next; 8736b74f9b7SNate Lawson uint32_t start_time, end_time; 874a2afe45aSNate Lawson int bm_active, cx_next_idx, i; 8756b74f9b7SNate Lawson 8766b74f9b7SNate Lawson /* If disabled, return immediately. */ 877907b6777SNate Lawson if (cpu_disable_idle) { 8786b74f9b7SNate Lawson ACPI_ENABLE_IRQS(); 8796b74f9b7SNate Lawson return; 8806b74f9b7SNate Lawson } 8816b74f9b7SNate Lawson 882cd1f3db9SNate Lawson /* 883cd1f3db9SNate Lawson * Look up our CPU id to get our softc. If it's NULL, we'll use C1 884cd1f3db9SNate Lawson * since there is no ACPI processor object for this CPU. This occurs 885cd1f3db9SNate Lawson * for logical CPUs in the HTT case. 886cd1f3db9SNate Lawson */ 887cd1f3db9SNate Lawson sc = cpu_softc[PCPU_GET(cpuid)]; 888cd1f3db9SNate Lawson if (sc == NULL) { 889cd1f3db9SNate Lawson acpi_cpu_c1(); 890cd1f3db9SNate Lawson return; 891cd1f3db9SNate Lawson } 892cd1f3db9SNate Lawson 893bb1d6ad5SAlexander Motin /* Find the lowest state that has small enough latency. */ 894b0baaaaeSAlexander Motin cx_next_idx = 0; 895a157e425SAlexander Motin #ifndef __ia64__ 896a157e425SAlexander Motin if (cpu_disable_deep_sleep) 897a157e425SAlexander Motin i = sc->cpu_non_c3; 898a157e425SAlexander Motin else 899a157e425SAlexander Motin #endif 900a157e425SAlexander Motin i = sc->cpu_cx_lowest; 901a157e425SAlexander Motin for (; i >= 0; i--) { 902b0baaaaeSAlexander Motin if (sc->cpu_cx_states[i].trans_lat * 3 <= sc->cpu_prev_sleep) { 903a2afe45aSNate Lawson cx_next_idx = i; 904a2afe45aSNate Lawson break; 905a2afe45aSNate Lawson } 90680f006a1SNate Lawson } 90756a70eadSNate Lawson 9086b74f9b7SNate Lawson /* 9096b74f9b7SNate Lawson * Check for bus master activity. If there was activity, clear 9106b74f9b7SNate Lawson * the bit and use the lowest non-C3 state. Note that the USB 9116b74f9b7SNate Lawson * driver polling for new devices keeps this bit set all the 912f435261dSNate Lawson * time if USB is loaded. 9136b74f9b7SNate Lawson */ 91418ececa0SNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 915129d3046SJung-uk Kim AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active); 9166b74f9b7SNate Lawson if (bm_active != 0) { 917129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1); 918907b6777SNate Lawson cx_next_idx = min(cx_next_idx, sc->cpu_non_c3); 9196b74f9b7SNate Lawson } 920f435261dSNate Lawson } 9216b74f9b7SNate Lawson 922a2afe45aSNate Lawson /* Select the next state and update statistics. */ 923a2afe45aSNate Lawson cx_next = &sc->cpu_cx_states[cx_next_idx]; 924907b6777SNate Lawson sc->cpu_cx_stats[cx_next_idx]++; 925a2afe45aSNate Lawson KASSERT(cx_next->type != ACPI_STATE_C0, ("acpi_cpu_idle: C0 sleep")); 9266b74f9b7SNate Lawson 9276b74f9b7SNate Lawson /* 928a2afe45aSNate Lawson * Execute HLT (or equivalent) and wait for an interrupt. We can't 9297150e671SAlexander Motin * precisely calculate the time spent in C1 since the place we wake up 930a157e425SAlexander Motin * is an ISR. Assume we slept no more then half of quantum, unless 931a157e425SAlexander Motin * we are called inside critical section, delaying context switch. 9326b74f9b7SNate Lawson */ 933a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C1) { 9347150e671SAlexander Motin AcpiHwRead(&start_time, &AcpiGbl_FADT.XPmTimerBlock); 935a2afe45aSNate Lawson acpi_cpu_c1(); 9367150e671SAlexander Motin AcpiHwRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 937a157e425SAlexander Motin end_time = PM_USEC(acpi_TimerDelta(end_time, start_time)); 938a157e425SAlexander Motin if (curthread->td_critnest == 0) 939a157e425SAlexander Motin end_time = min(end_time, 500000 / hz); 940a157e425SAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + end_time) / 4; 941a2afe45aSNate Lawson return; 942a2afe45aSNate Lawson } 943a2afe45aSNate Lawson 944f435261dSNate Lawson /* 945f435261dSNate Lawson * For C3, disable bus master arbitration and enable bus master wake 946f435261dSNate Lawson * if BM control is available, otherwise flush the CPU cache. 947f435261dSNate Lawson */ 948a2afe45aSNate Lawson if (cx_next->type == ACPI_STATE_C3) { 949f435261dSNate Lawson if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 950129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 1); 951129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 1); 952f435261dSNate Lawson } else 953f435261dSNate Lawson ACPI_FLUSH_CPU_CACHE(); 954a2afe45aSNate Lawson } 955a2afe45aSNate Lawson 9566b74f9b7SNate Lawson /* 957a2afe45aSNate Lawson * Read from P_LVLx to enter C2(+), checking time spent asleep. 9586b74f9b7SNate Lawson * Use the ACPI timer for measuring sleep time. Since we need to 9596b74f9b7SNate Lawson * get the time very close to the CPU start/stop clock logic, this 9606b74f9b7SNate Lawson * is the only reliable time source. 9616b74f9b7SNate Lawson */ 96292488a57SJung-uk Kim AcpiHwRead(&start_time, &AcpiGbl_FADT.XPmTimerBlock); 9636b74f9b7SNate Lawson CPU_GET_REG(cx_next->p_lvlx, 1); 9646b74f9b7SNate Lawson 9656b74f9b7SNate Lawson /* 9666b74f9b7SNate Lawson * Read the end time twice. Since it may take an arbitrary time 9676b74f9b7SNate Lawson * to enter the idle state, the first read may be executed before 9686b74f9b7SNate Lawson * the processor has stopped. Doing it again provides enough 9696b74f9b7SNate Lawson * margin that we are certain to have a correct value. 9706b74f9b7SNate Lawson */ 97192488a57SJung-uk Kim AcpiHwRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 97292488a57SJung-uk Kim AcpiHwRead(&end_time, &AcpiGbl_FADT.XPmTimerBlock); 9736b74f9b7SNate Lawson 9746b74f9b7SNate Lawson /* Enable bus master arbitration and disable bus master wakeup. */ 97518ececa0SNate Lawson if (cx_next->type == ACPI_STATE_C3 && 97618ececa0SNate Lawson (cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0) { 977129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_ARB_DISABLE, 0); 978129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 9796b74f9b7SNate Lawson } 98080f006a1SNate Lawson ACPI_ENABLE_IRQS(); 9816b74f9b7SNate Lawson 982b0baaaaeSAlexander Motin /* Find the actual time asleep in microseconds. */ 983eea17c34SNate Lawson end_time = acpi_TimerDelta(end_time, start_time); 984b0baaaaeSAlexander Motin sc->cpu_prev_sleep = (sc->cpu_prev_sleep * 3 + PM_USEC(end_time)) / 4; 9856b74f9b7SNate Lawson } 9866b74f9b7SNate Lawson 9876b74f9b7SNate Lawson /* 9888b888c66SNate Lawson * Re-evaluate the _CST object when we are notified that it changed. 98956a70eadSNate Lawson * 9906b74f9b7SNate Lawson * XXX Re-evaluation disabled until locking is done. 9916b74f9b7SNate Lawson */ 9926b74f9b7SNate Lawson static void 9936b74f9b7SNate Lawson acpi_cpu_notify(ACPI_HANDLE h, UINT32 notify, void *context) 9946b74f9b7SNate Lawson { 9956b74f9b7SNate Lawson struct acpi_cpu_softc *sc = (struct acpi_cpu_softc *)context; 99689ab2a7aSRui Paulo struct acpi_cpu_softc *isc; 99789ab2a7aSRui Paulo int i; 9986b74f9b7SNate Lawson 9998b888c66SNate Lawson if (notify != ACPI_NOTIFY_CX_STATES) 10008b888c66SNate Lawson return; 10018b888c66SNate Lawson 100289ab2a7aSRui Paulo /* Update the list of Cx states. */ 100389ab2a7aSRui Paulo acpi_cpu_cx_cst(sc); 100489ab2a7aSRui Paulo acpi_cpu_cx_list(sc); 100589ab2a7aSRui Paulo 100689ab2a7aSRui Paulo /* Update the new lowest useable Cx state for all CPUs. */ 100789ab2a7aSRui Paulo ACPI_SERIAL_BEGIN(cpu); 100889ab2a7aSRui Paulo cpu_cx_count = 0; 100989ab2a7aSRui Paulo for (i = 0; i < cpu_ndevices; i++) { 101089ab2a7aSRui Paulo isc = device_get_softc(cpu_devices[i]); 101189ab2a7aSRui Paulo if (isc->cpu_cx_count > cpu_cx_count) 101289ab2a7aSRui Paulo cpu_cx_count = isc->cpu_cx_count; 101389ab2a7aSRui Paulo } 101442040ff0SJohn Baldwin if (sc->cpu_cx_lowest < cpu_cx_lowest) 101542040ff0SJohn Baldwin acpi_cpu_set_cx_lowest(sc, min(cpu_cx_lowest, sc->cpu_cx_count - 1)); 101689ab2a7aSRui Paulo ACPI_SERIAL_END(cpu); 10176b74f9b7SNate Lawson } 10186b74f9b7SNate Lawson 10196b74f9b7SNate Lawson static int 1020907b6777SNate Lawson acpi_cpu_quirks(void) 10216b74f9b7SNate Lawson { 1022ae56b59fSNate Lawson device_t acpi_dev; 10238a000acaSRui Paulo uint32_t val; 10246b74f9b7SNate Lawson 10257826bf98SNate Lawson ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 10267826bf98SNate Lawson 10276b74f9b7SNate Lawson /* 1028907b6777SNate Lawson * Bus mastering arbitration control is needed to keep caches coherent 1029907b6777SNate Lawson * while sleeping in C3. If it's not present but a working flush cache 1030907b6777SNate Lawson * instruction is present, flush the caches before entering C3 instead. 1031907b6777SNate Lawson * Otherwise, just disable C3 completely. 10326b74f9b7SNate Lawson */ 10332be4e471SJung-uk Kim if (AcpiGbl_FADT.Pm2ControlBlock == 0 || 10342be4e471SJung-uk Kim AcpiGbl_FADT.Pm2ControlLength == 0) { 10352be4e471SJung-uk Kim if ((AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD) && 10362be4e471SJung-uk Kim (AcpiGbl_FADT.Flags & ACPI_FADT_WBINVD_FLUSH) == 0) { 1037907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 1038907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 103930dd6af3SNate Lawson "acpi_cpu: no BM control, using flush cache method\n")); 1040907b6777SNate Lawson } else { 1041907b6777SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 1042907b6777SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 104330dd6af3SNate Lawson "acpi_cpu: no BM control, C3 not available\n")); 1044907b6777SNate Lawson } 1045907b6777SNate Lawson } 1046907b6777SNate Lawson 1047907b6777SNate Lawson /* 1048907b6777SNate Lawson * If we are using generic Cx mode, C3 on multiple CPUs requires using 1049907b6777SNate Lawson * the expensive flush cache instruction. 1050907b6777SNate Lawson */ 105130dd6af3SNate Lawson if (cpu_cx_generic && mp_ncpus > 1) { 105218ececa0SNate Lawson cpu_quirks |= CPU_QUIRK_NO_BM_CTRL; 105330dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 105430dd6af3SNate Lawson "acpi_cpu: SMP, using flush cache mode for C3\n")); 105530dd6af3SNate Lawson } 10566b74f9b7SNate Lawson 10576b74f9b7SNate Lawson /* Look for various quirks of the PIIX4 part. */ 10586b74f9b7SNate Lawson acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3); 10596b74f9b7SNate Lawson if (acpi_dev != NULL) { 10606b74f9b7SNate Lawson switch (pci_get_revid(acpi_dev)) { 10616b74f9b7SNate Lawson /* 10626b74f9b7SNate Lawson * Disable C3 support for all PIIX4 chipsets. Some of these parts 10636b74f9b7SNate Lawson * do not report the BMIDE status to the BM status register and 10646b74f9b7SNate Lawson * others have a livelock bug if Type-F DMA is enabled. Linux 10656b74f9b7SNate Lawson * works around the BMIDE bug by reading the BM status directly 10666b74f9b7SNate Lawson * but we take the simpler approach of disabling C3 for these 10676b74f9b7SNate Lawson * parts. 10686b74f9b7SNate Lawson * 10696b74f9b7SNate Lawson * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA 10706b74f9b7SNate Lawson * Livelock") from the January 2002 PIIX4 specification update. 10716b74f9b7SNate Lawson * Applies to all PIIX4 models. 10728a000acaSRui Paulo * 10738a000acaSRui Paulo * Also, make sure that all interrupts cause a "Stop Break" 10748a000acaSRui Paulo * event to exit from C2 state. 1075f1e1ddc3SAndriy Gapon * Also, BRLD_EN_BM (ACPI_BITREG_BUS_MASTER_RLD in ACPI-speak) 1076f1e1ddc3SAndriy Gapon * should be set to zero, otherwise it causes C2 to short-sleep. 1077f1e1ddc3SAndriy Gapon * PIIX4 doesn't properly support C3 and bus master activity 1078f1e1ddc3SAndriy Gapon * need not break out of C2. 10796b74f9b7SNate Lawson */ 10808a000acaSRui Paulo case PCI_REVISION_A_STEP: 10818a000acaSRui Paulo case PCI_REVISION_B_STEP: 10826b74f9b7SNate Lawson case PCI_REVISION_4E: 10836b74f9b7SNate Lawson case PCI_REVISION_4M: 10846b74f9b7SNate Lawson cpu_quirks |= CPU_QUIRK_NO_C3; 108530dd6af3SNate Lawson ACPI_DEBUG_PRINT((ACPI_DB_INFO, 108630dd6af3SNate Lawson "acpi_cpu: working around PIIX4 bug, disabling C3\n")); 10878a000acaSRui Paulo 10888a000acaSRui Paulo val = pci_read_config(acpi_dev, PIIX4_DEVACTB_REG, 4); 10898a000acaSRui Paulo if ((val & PIIX4_STOP_BREAK_MASK) != PIIX4_STOP_BREAK_MASK) { 10908a000acaSRui Paulo ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1091f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: enabling IRQs to generate Stop Break\n")); 10928a000acaSRui Paulo val |= PIIX4_STOP_BREAK_MASK; 10938a000acaSRui Paulo pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4); 10948a000acaSRui Paulo } 1095129d3046SJung-uk Kim AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val); 1096f1e1ddc3SAndriy Gapon if (val) { 1097f1e1ddc3SAndriy Gapon ACPI_DEBUG_PRINT((ACPI_DB_INFO, 1098f1e1ddc3SAndriy Gapon "acpi_cpu: PIIX4: reset BRLD_EN_BM\n")); 1099129d3046SJung-uk Kim AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0); 1100f1e1ddc3SAndriy Gapon } 11016b74f9b7SNate Lawson break; 11026b74f9b7SNate Lawson default: 11036b74f9b7SNate Lawson break; 11046b74f9b7SNate Lawson } 11056b74f9b7SNate Lawson } 11066b74f9b7SNate Lawson 11076b74f9b7SNate Lawson return (0); 11086b74f9b7SNate Lawson } 11096b74f9b7SNate Lawson 11106b74f9b7SNate Lawson static int 1111a2afe45aSNate Lawson acpi_cpu_usage_sysctl(SYSCTL_HANDLER_ARGS) 11126b74f9b7SNate Lawson { 1113907b6777SNate Lawson struct acpi_cpu_softc *sc; 11146b74f9b7SNate Lawson struct sbuf sb; 11156b74f9b7SNate Lawson char buf[128]; 11166b74f9b7SNate Lawson int i; 11174a03551dSNate Lawson uintmax_t fract, sum, whole; 11186b74f9b7SNate Lawson 1119907b6777SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 11203e7fa136SNate Lawson sum = 0; 1121907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) 1122907b6777SNate Lawson sum += sc->cpu_cx_stats[i]; 11236b74f9b7SNate Lawson sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 1124907b6777SNate Lawson for (i = 0; i < sc->cpu_cx_count; i++) { 11253e7fa136SNate Lawson if (sum > 0) { 1126907b6777SNate Lawson whole = (uintmax_t)sc->cpu_cx_stats[i] * 100; 11273e7fa136SNate Lawson fract = (whole % sum) * 100; 11283e7fa136SNate Lawson sbuf_printf(&sb, "%u.%02u%% ", (u_int)(whole / sum), 11293e7fa136SNate Lawson (u_int)(fract / sum)); 11303e7fa136SNate Lawson } else 11312500b6d9SAlexander Motin sbuf_printf(&sb, "0.00%% "); 11323e7fa136SNate Lawson } 11332500b6d9SAlexander Motin sbuf_printf(&sb, "last %dus", sc->cpu_prev_sleep); 11346b74f9b7SNate Lawson sbuf_trim(&sb); 11356b74f9b7SNate Lawson sbuf_finish(&sb); 1136ccc09458SNate Lawson sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 1137ccc09458SNate Lawson sbuf_delete(&sb); 11386b74f9b7SNate Lawson 11396b74f9b7SNate Lawson return (0); 11406b74f9b7SNate Lawson } 11416b74f9b7SNate Lawson 11426b74f9b7SNate Lawson static int 1143b13cf774SNate Lawson acpi_cpu_set_cx_lowest(struct acpi_cpu_softc *sc, int val) 11446b74f9b7SNate Lawson { 1145b13cf774SNate Lawson int i; 11466b74f9b7SNate Lawson 1147b13cf774SNate Lawson ACPI_SERIAL_ASSERT(cpu); 1148907b6777SNate Lawson sc->cpu_cx_lowest = val; 1149907b6777SNate Lawson 1150907b6777SNate Lawson /* If not disabling, cache the new lowest non-C3 state. */ 1151907b6777SNate Lawson sc->cpu_non_c3 = 0; 1152907b6777SNate Lawson for (i = sc->cpu_cx_lowest; i >= 0; i--) { 1153907b6777SNate Lawson if (sc->cpu_cx_states[i].type < ACPI_STATE_C3) { 1154907b6777SNate Lawson sc->cpu_non_c3 = i; 1155907b6777SNate Lawson break; 1156907b6777SNate Lawson } 1157907b6777SNate Lawson } 1158907b6777SNate Lawson 1159907b6777SNate Lawson /* Reset the statistics counters. */ 1160907b6777SNate Lawson bzero(sc->cpu_cx_stats, sizeof(sc->cpu_cx_stats)); 1161b13cf774SNate Lawson return (0); 1162b13cf774SNate Lawson } 1163b13cf774SNate Lawson 1164b13cf774SNate Lawson static int 1165b13cf774SNate Lawson acpi_cpu_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1166b13cf774SNate Lawson { 1167b13cf774SNate Lawson struct acpi_cpu_softc *sc; 1168b13cf774SNate Lawson char state[8]; 1169b13cf774SNate Lawson int val, error; 1170b13cf774SNate Lawson 1171b13cf774SNate Lawson sc = (struct acpi_cpu_softc *) arg1; 1172b13cf774SNate Lawson snprintf(state, sizeof(state), "C%d", sc->cpu_cx_lowest + 1); 1173b13cf774SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 1174b13cf774SNate Lawson if (error != 0 || req->newptr == NULL) 1175b13cf774SNate Lawson return (error); 1176b13cf774SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1177b13cf774SNate Lawson return (EINVAL); 1178b13cf774SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 1179b13cf774SNate Lawson if (val < 0 || val > sc->cpu_cx_count - 1) 1180b13cf774SNate Lawson return (EINVAL); 1181b13cf774SNate Lawson 1182b13cf774SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1183b13cf774SNate Lawson acpi_cpu_set_cx_lowest(sc, val); 1184907b6777SNate Lawson ACPI_SERIAL_END(cpu); 1185907b6777SNate Lawson 1186907b6777SNate Lawson return (0); 1187907b6777SNate Lawson } 1188907b6777SNate Lawson 1189907b6777SNate Lawson static int 1190907b6777SNate Lawson acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS) 1191907b6777SNate Lawson { 1192907b6777SNate Lawson struct acpi_cpu_softc *sc; 1193907b6777SNate Lawson char state[8]; 1194b13cf774SNate Lawson int val, error, i; 1195907b6777SNate Lawson 1196ccc09458SNate Lawson snprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1); 1197ccc09458SNate Lawson error = sysctl_handle_string(oidp, state, sizeof(state), req); 11986b74f9b7SNate Lawson if (error != 0 || req->newptr == NULL) 11996b74f9b7SNate Lawson return (error); 1200ccc09458SNate Lawson if (strlen(state) < 2 || toupper(state[0]) != 'C') 1201ccc09458SNate Lawson return (EINVAL); 1202ccc09458SNate Lawson val = (int) strtol(state + 1, NULL, 10) - 1; 120356a70eadSNate Lawson if (val < 0 || val > cpu_cx_count - 1) 12046b74f9b7SNate Lawson return (EINVAL); 12056b74f9b7SNate Lawson cpu_cx_lowest = val; 12066b74f9b7SNate Lawson 1207b13cf774SNate Lawson /* Update the new lowest useable Cx state for all CPUs. */ 1208907b6777SNate Lawson ACPI_SERIAL_BEGIN(cpu); 1209907b6777SNate Lawson for (i = 0; i < cpu_ndevices; i++) { 1210907b6777SNate Lawson sc = device_get_softc(cpu_devices[i]); 121142040ff0SJohn Baldwin acpi_cpu_set_cx_lowest(sc, min(val, sc->cpu_cx_count - 1)); 1212907b6777SNate Lawson } 1213d92a2ebdSNate Lawson ACPI_SERIAL_END(cpu); 12146b74f9b7SNate Lawson 12156b74f9b7SNate Lawson return (0); 12166b74f9b7SNate Lawson } 1217